Indicator for vacuum-jackets.



J. L. FATE. I INDICATOR FOB VACUUM JACKETS. APPLICATION FILED DEG. 16, 19(jl8.

Patented Aug. 24,1909.

glwmvss ssss refer to like nmn ear tries manna, ora ion EOEN L AMPSON FATE, 0F UHdGAGO, ILLINOIS, ASSIGNOE TO AMEBZOA A GORPOBATIQN, 0F HAKNE.

INDHJATOB FOR VAGU'UltE-JACZEE TS.

t ams.

To all whom it may concern;

Be it known that I, J OHN L. FATE, a citi- I zen of theUnited States, residing at Chicago, county of Cook, and State of Illinois, have invented a certain new and useful Improvement in Indicators for Vacuum-Jackets, of which the following is a specification.

My invention has for its object toprovide an improved indicator for vacuum jackets, and to this end the invention consists'of the novel device and combinations of devices hereinafter described and defined in the cl ini.

The invention is illustrated in the accompanying drawings, wherein like references parts-throughout the several vlews.

In said drawings, Figure 1 is a view in elevation, showing a portion 01 a vacuum jacket equipped with my improved indicator, with the signal piece thereof in its uppermost or concealed position; or the position which it normally keeps so long as the vacuum is intact; Fig. 2 is a similar view of the same parts, but with the signal piece shown in'its exposed position or the one to which it drops under the action. of gravity as soon the vacuum is broken; Fig. 3 is a vertical section on the line 0: cf of Fig. 1.

In the said drawings, the numerals 2 and 3 represent the walls of the vacuum jacket inclosing a chamber 1 adapted to afford a vacuum chamber when the air is exhausted therefrom. In the external wall 2 ofthis jacket is mounted gnfia nge'd mp4 with its flange 5 brazed fast to the'sziidwal'l with an air tight joint. "The inner end 6 of thiscup i is adapted to serve diaphragm subject to the atmospheric pressure on its external face and to whatever pressure may be within the chamber 1 on its internal face. To the diaphragm 6 is fixed a stud 7 which carries, at its outer end, a concave shield or cover 8 of slightly greater diameter than the cup 4. This cover 8 has a. stud 9, below the center of the cup 4 and the stud 7 to which is pivoted an eccentric si 'nal piece 10 of hook shape on its inner e ge. This signal piece 10 is made of'this shape so that it may be turned up into the position shown in Fig. I and is of such size that it can be embraced by the cover pr shield and be .held up'by the cup andfthe' inwardly pro ecting Specification of Letters Patent. Patented Aug. 24, 19%;). Application filed. December 18, 1908.

Serial No. AS1891.

broken, then the air pressure will equalize,

on the opposite sides 0 the diaphragm 6 and the latter, together with all parts earned or operated thereby, will move outward intothe dotted line posit-ions shown in Fig. 3; and thereupon, the signal piece 10 will drop into its exposed position, as best sl'iownin Fig. 2. The signal piece 10 thus drops under the action of gravity, for the reason that the inturned flanged portion of thecover 8 will have moved outward far enough to permit the signal piece to drop between the cover,

and the outer wall 2 of the jacket. In practice, it is preferable to have on the -face ofv the signal piecelO the words Out of order so as to attract attention.

The advantage of such an indicator for use on vacuum jacketed storage and shipping receptacles is obvious.

Of course, it must be understood that the details of'the construction can be changed within the scope of the appended claim without departing from the spirit of the invention.

What- I claim is:

A vacuum jacket having anindicator diaphragm supported in its outer wall to move inwardly and outwardly as a vacuum. is maintained or lost, a cover spaced apart froxnand movable with said diaphragm and a signal piece or indicator mounted in the space betweenthe cover and diaphragm, the said parts being so arranged that said cover will keep the signal piece concealed as long as the diaphragm is in its innermost position or while the vacuum ismaintained and that the signal piece will move into an exposed position as soon as the cover moves outwardly or the vacuum is lost, substantially as described.

'' JUHN LAMPEQQN FAllE.

l l itnesses G M. Banana-rerun, G. Goiiosan'rni N INSULATING company 

